Stay away from the red trees by Pat Flannery. Full video. h/t: Ray Manta.
Alive Software’s very pretty Summer 1996 catalog. From ALIVECAT.exe
Animated Madonna ANSI by MCL, circa 1989. Found by Noel Gamba, posted on giphy.
From an MZ-80 game by Hudson. Full video here.
SpankSCII by Lordnkon.
PETSCII wobble by James, @uniquename654.
Terminal Rain, a textmode game with a custom font, developed by Jackson Lango.
Hatsune Miku in 1000 layers of ASCII characters, by James Lyle. Full video here.